“Don’t leave us!” one student shouted to Rodríguez after the class sang a medley. Other fourth- and fifth-graders wrapped their arms around one another, wiping tears from their eyes.

Rodríguez, a Venezuelan national, was legally living and working in this D.C. suburb under a humanitarian parole program that the Trump administration announced would end early. Without a clear path to stay legally, he decided to leave the United States, worried he could end up inside a Salvadoran prison — separated from his wife and 6-year-old daughter — if he didn’t.

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With plans in place to move to Spain, Rodríguez still had a job to do on his very last day of class. So, on came “Fly Me to the Moon” for the chorus, an American classic about the euphoria of being in love. “Mr. Rodríguez, we’re going to miss you,” a girl told the teacher after singing.

“I’m going to miss you, too,” he said, fighting back tears of his own.